Metal powder preparation device and metal powder preparation method

The invention provides a metal powder preparation device and a metal powder preparation method.The metal powder preparation device comprises a raw material bin, a spiral conveyor, an air grinding bin, a vertical grinding bin separation bin, a grading motor and a grading wheel, and an outlet of the raw material bin communicates with an inlet of the spiral conveyor through a pipeline; an outlet of the spiral conveyor is communicated with a feeding port of the air milling bin through a pipeline, an outlet of the air milling bin is communicated with the bottom end of the vertical milling bin, a high-abrasion-resistance material milling rod is coaxially arranged in the vertical milling bin, the top end of the vertical milling bin is communicated with an inlet of the separation bin through a bent pipe, and the top of the separation bin is provided with a separation motor and a classification wheel. A discharging mechanism is arranged at the bottom discharging opening, and an outlet of the discharging mechanism is c